2G = GSM

2.5G = GPRS

2.75G = EDGE

3G = WCDMA

3.5G = HSDPA

3.75G = HSUPA

3.8G = HSPA+

3.85G = 'HSPA+' + MIMO

3.9G = LTE

其實在台灣站台到手機間的速度是噱頭.....重點是站台資源與對核心網路的頻寬